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realview_pbx.c
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1 /*
2  * arch/arm/mach-realview/realview_pbx.c
3  *
4  * Copyright (C) 2009 ARM Limited
5  * Copyright (C) 2000 Deep Blue Solutions Ltd
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  */
20 
21 #include <linux/init.h>
22 #include <linux/platform_device.h>
23 #include <linux/device.h>
24 #include <linux/amba/bus.h>
25 #include <linux/amba/pl061.h>
26 #include <linux/amba/mmci.h>
27 #include <linux/amba/pl022.h>
28 #include <linux/io.h>
29 #include <linux/platform_data/clk-realview.h>
30 
31 #include <asm/irq.h>
32 #include <asm/mach-types.h>
33 #include <asm/smp_twd.h>
34 #include <asm/pgtable.h>
35 #include <asm/hardware/gic.h>
36 #include <asm/hardware/cache-l2x0.h>
37 
38 #include <asm/mach/arch.h>
39 #include <asm/mach/map.h>
40 #include <asm/mach/time.h>
41 
42 #include <mach/hardware.h>
43 #include <mach/board-pbx.h>
44 #include <mach/irqs.h>
45 
46 #include "core.h"
47 
48 static struct map_desc realview_pbx_io_desc[] __initdata = {
49  {
50  .virtual = IO_ADDRESS(REALVIEW_SYS_BASE),
51  .pfn = __phys_to_pfn(REALVIEW_SYS_BASE),
52  .length = SZ_4K,
53  .type = MT_DEVICE,
54  }, {
55  .virtual = IO_ADDRESS(REALVIEW_PBX_GIC_CPU_BASE),
56  .pfn = __phys_to_pfn(REALVIEW_PBX_GIC_CPU_BASE),
57  .length = SZ_4K,
58  .type = MT_DEVICE,
59  }, {
60  .virtual = IO_ADDRESS(REALVIEW_PBX_GIC_DIST_BASE),
61  .pfn = __phys_to_pfn(REALVIEW_PBX_GIC_DIST_BASE),
62  .length = SZ_4K,
63  .type = MT_DEVICE,
64  }, {
65  .virtual = IO_ADDRESS(REALVIEW_SCTL_BASE),
66  .pfn = __phys_to_pfn(REALVIEW_SCTL_BASE),
67  .length = SZ_4K,
68  .type = MT_DEVICE,
69  }, {
70  .virtual = IO_ADDRESS(REALVIEW_PBX_TIMER0_1_BASE),
71  .pfn = __phys_to_pfn(REALVIEW_PBX_TIMER0_1_BASE),
72  .length = SZ_4K,
73  .type = MT_DEVICE,
74  }, {
75  .virtual = IO_ADDRESS(REALVIEW_PBX_TIMER2_3_BASE),
76  .pfn = __phys_to_pfn(REALVIEW_PBX_TIMER2_3_BASE),
77  .length = SZ_4K,
78  .type = MT_DEVICE,
79  },
80 #ifdef CONFIG_PCI
81  {
82  .virtual = PCIX_UNIT_BASE,
83  .pfn = __phys_to_pfn(REALVIEW_PBX_PCI_BASE),
84  .length = REALVIEW_PBX_PCI_BASE_SIZE,
85  .type = MT_DEVICE,
86  },
87 #endif
88 #ifdef CONFIG_DEBUG_LL
89  {
90  .virtual = IO_ADDRESS(REALVIEW_PBX_UART0_BASE),
91  .pfn = __phys_to_pfn(REALVIEW_PBX_UART0_BASE),
92  .length = SZ_4K,
93  .type = MT_DEVICE,
94  },
95 #endif
96 };
97 
98 static struct map_desc realview_local_io_desc[] __initdata = {
99  {
100  .virtual = IO_ADDRESS(REALVIEW_PBX_TILE_SCU_BASE),
101  .pfn = __phys_to_pfn(REALVIEW_PBX_TILE_SCU_BASE),
102  .length = SZ_4K,
103  .type = MT_DEVICE,
104  }, {
105  .virtual = IO_ADDRESS(REALVIEW_PBX_TILE_GIC_DIST_BASE),
106  .pfn = __phys_to_pfn(REALVIEW_PBX_TILE_GIC_DIST_BASE),
107  .length = SZ_4K,
108  .type = MT_DEVICE,
109  }, {
110  .virtual = IO_ADDRESS(REALVIEW_PBX_TILE_L220_BASE),
111  .pfn = __phys_to_pfn(REALVIEW_PBX_TILE_L220_BASE),
112  .length = SZ_8K,
113  .type = MT_DEVICE,
114  }
115 };
116 
117 static void __init realview_pbx_map_io(void)
118 {
119  iotable_init(realview_pbx_io_desc, ARRAY_SIZE(realview_pbx_io_desc));
120  if (core_tile_pbx11mp() || core_tile_pbxa9mp())
121  iotable_init(realview_local_io_desc, ARRAY_SIZE(realview_local_io_desc));
122 }
123 
124 static struct pl061_platform_data gpio0_plat_data = {
125  .gpio_base = 0,
126 };
127 
128 static struct pl061_platform_data gpio1_plat_data = {
129  .gpio_base = 8,
130 };
131 
132 static struct pl061_platform_data gpio2_plat_data = {
133  .gpio_base = 16,
134 };
135 
136 static struct pl022_ssp_controller ssp0_plat_data = {
137  .bus_id = 0,
138  .enable_dma = 0,
139  .num_chipselect = 1,
140 };
141 
142 /*
143  * RealView PBXCore AMBA devices
144  */
145 
146 #define GPIO2_IRQ { IRQ_PBX_GPIO2 }
147 #define GPIO3_IRQ { IRQ_PBX_GPIO3 }
148 #define AACI_IRQ { IRQ_PBX_AACI }
149 #define MMCI0_IRQ { IRQ_PBX_MMCI0A, IRQ_PBX_MMCI0B }
150 #define KMI0_IRQ { IRQ_PBX_KMI0 }
151 #define KMI1_IRQ { IRQ_PBX_KMI1 }
152 #define PBX_SMC_IRQ { }
153 #define MPMC_IRQ { }
154 #define PBX_CLCD_IRQ { IRQ_PBX_CLCD }
155 #define DMAC_IRQ { IRQ_PBX_DMAC }
156 #define SCTL_IRQ { }
157 #define PBX_WATCHDOG_IRQ { IRQ_PBX_WATCHDOG }
158 #define PBX_GPIO0_IRQ { IRQ_PBX_GPIO0 }
159 #define GPIO1_IRQ { IRQ_PBX_GPIO1 }
160 #define PBX_RTC_IRQ { IRQ_PBX_RTC }
161 #define SCI_IRQ { IRQ_PBX_SCI }
162 #define PBX_UART0_IRQ { IRQ_PBX_UART0 }
163 #define PBX_UART1_IRQ { IRQ_PBX_UART1 }
164 #define PBX_UART2_IRQ { IRQ_PBX_UART2 }
165 #define PBX_UART3_IRQ { IRQ_PBX_UART3 }
166 #define PBX_SSP_IRQ { IRQ_PBX_SSP }
167 
168 /* FPGA Primecells */
169 APB_DEVICE(aaci, "fpga:aaci", AACI, NULL);
170 APB_DEVICE(mmc0, "fpga:mmc0", MMCI0, &realview_mmc0_plat_data);
171 APB_DEVICE(kmi0, "fpga:kmi0", KMI0, NULL);
172 APB_DEVICE(kmi1, "fpga:kmi1", KMI1, NULL);
173 APB_DEVICE(uart3, "fpga:uart3", PBX_UART3, NULL);
174 
175 /* DevChip Primecells */
176 AHB_DEVICE(smc, "dev:smc", PBX_SMC, NULL);
177 AHB_DEVICE(sctl, "dev:sctl", SCTL, NULL);
178 APB_DEVICE(wdog, "dev:wdog", PBX_WATCHDOG, NULL);
179 APB_DEVICE(gpio0, "dev:gpio0", PBX_GPIO0, &gpio0_plat_data);
180 APB_DEVICE(gpio1, "dev:gpio1", GPIO1, &gpio1_plat_data);
181 APB_DEVICE(gpio2, "dev:gpio2", GPIO2, &gpio2_plat_data);
182 APB_DEVICE(rtc, "dev:rtc", PBX_RTC, NULL);
183 APB_DEVICE(sci0, "dev:sci0", SCI, NULL);
184 APB_DEVICE(uart0, "dev:uart0", PBX_UART0, NULL);
185 APB_DEVICE(uart1, "dev:uart1", PBX_UART1, NULL);
186 APB_DEVICE(uart2, "dev:uart2", PBX_UART2, NULL);
187 APB_DEVICE(ssp0, "dev:ssp0", PBX_SSP, &ssp0_plat_data);
188 
189 /* Primecells on the NEC ISSP chip */
190 AHB_DEVICE(clcd, "issp:clcd", PBX_CLCD, &clcd_plat_data);
191 AHB_DEVICE(dmac, "issp:dmac", DMAC, NULL);
192 
193 static struct amba_device *amba_devs[] __initdata = {
194  &dmac_device,
195  &uart0_device,
196  &uart1_device,
197  &uart2_device,
198  &uart3_device,
199  &smc_device,
200  &clcd_device,
201  &sctl_device,
202  &wdog_device,
203  &gpio0_device,
204  &gpio1_device,
205  &gpio2_device,
206  &rtc_device,
207  &sci0_device,
208  &ssp0_device,
209  &aaci_device,
210  &mmc0_device,
211  &kmi0_device,
212  &kmi1_device,
213 };
214 
215 /*
216  * RealView PB-X platform devices
217  */
218 static struct resource realview_pbx_flash_resources[] = {
219  [0] = {
220  .start = REALVIEW_PBX_FLASH0_BASE,
221  .end = REALVIEW_PBX_FLASH0_BASE + REALVIEW_PBX_FLASH0_SIZE - 1,
222  .flags = IORESOURCE_MEM,
223  },
224  [1] = {
225  .start = REALVIEW_PBX_FLASH1_BASE,
226  .end = REALVIEW_PBX_FLASH1_BASE + REALVIEW_PBX_FLASH1_SIZE - 1,
227  .flags = IORESOURCE_MEM,
228  },
229 };
230 
231 static struct resource realview_pbx_smsc911x_resources[] = {
232  [0] = {
233  .start = REALVIEW_PBX_ETH_BASE,
234  .end = REALVIEW_PBX_ETH_BASE + SZ_64K - 1,
235  .flags = IORESOURCE_MEM,
236  },
237  [1] = {
238  .start = IRQ_PBX_ETH,
239  .end = IRQ_PBX_ETH,
240  .flags = IORESOURCE_IRQ,
241  },
242 };
243 
244 static struct resource realview_pbx_isp1761_resources[] = {
245  [0] = {
246  .start = REALVIEW_PBX_USB_BASE,
247  .end = REALVIEW_PBX_USB_BASE + SZ_128K - 1,
248  .flags = IORESOURCE_MEM,
249  },
250  [1] = {
251  .start = IRQ_PBX_USB,
252  .end = IRQ_PBX_USB,
253  .flags = IORESOURCE_IRQ,
254  },
255 };
256 
257 static struct resource pmu_resources[] = {
258  [0] = {
259  .start = IRQ_PBX_PMU_CPU0,
260  .end = IRQ_PBX_PMU_CPU0,
261  .flags = IORESOURCE_IRQ,
262  },
263  [1] = {
264  .start = IRQ_PBX_PMU_CPU1,
265  .end = IRQ_PBX_PMU_CPU1,
266  .flags = IORESOURCE_IRQ,
267  },
268  [2] = {
269  .start = IRQ_PBX_PMU_CPU2,
270  .end = IRQ_PBX_PMU_CPU2,
271  .flags = IORESOURCE_IRQ,
272  },
273  [3] = {
274  .start = IRQ_PBX_PMU_CPU3,
275  .end = IRQ_PBX_PMU_CPU3,
276  .flags = IORESOURCE_IRQ,
277  },
278 };
279 
280 static struct platform_device pmu_device = {
281  .name = "arm-pmu",
282  .id = -1,
283  .num_resources = ARRAY_SIZE(pmu_resources),
284  .resource = pmu_resources,
285 };
286 
287 static void __init gic_init_irq(void)
288 {
289  /* ARM PBX on-board GIC */
290  if (core_tile_pbx11mp() || core_tile_pbxa9mp()) {
291  gic_init(0, 29, __io_address(REALVIEW_PBX_TILE_GIC_DIST_BASE),
292  __io_address(REALVIEW_PBX_TILE_GIC_CPU_BASE));
293  } else {
294  gic_init(0, IRQ_PBX_GIC_START,
295  __io_address(REALVIEW_PBX_GIC_DIST_BASE),
296  __io_address(REALVIEW_PBX_GIC_CPU_BASE));
297  }
298 }
299 
300 #ifdef CONFIG_HAVE_ARM_TWD
301 static DEFINE_TWD_LOCAL_TIMER(twd_local_timer,
302  REALVIEW_PBX_TILE_TWD_BASE,
303  IRQ_LOCALTIMER);
304 
305 static void __init realview_pbx_twd_init(void)
306 {
307  int err = twd_local_timer_register(&twd_local_timer);
308  if (err)
309  pr_err("twd_local_timer_register failed %d\n", err);
310 }
311 #else
312 #define realview_pbx_twd_init() do { } while(0)
313 #endif
314 
315 static void __init realview_pbx_timer_init(void)
316 {
317  timer0_va_base = __io_address(REALVIEW_PBX_TIMER0_1_BASE);
318  timer1_va_base = __io_address(REALVIEW_PBX_TIMER0_1_BASE) + 0x20;
319  timer2_va_base = __io_address(REALVIEW_PBX_TIMER2_3_BASE);
320  timer3_va_base = __io_address(REALVIEW_PBX_TIMER2_3_BASE) + 0x20;
321 
322  realview_clk_init(__io_address(REALVIEW_SYS_BASE), false);
323  realview_timer_init(IRQ_PBX_TIMER0_1);
324  realview_pbx_twd_init();
325 }
326 
327 static struct sys_timer realview_pbx_timer = {
328  .init = realview_pbx_timer_init,
329 };
330 
331 static void realview_pbx_fixup(struct tag *tags, char **from,
332  struct meminfo *meminfo)
333 {
334 #ifdef CONFIG_SPARSEMEM
335  /*
336  * Memory configuration with SPARSEMEM enabled on RealView PBX (see
337  * asm/mach/memory.h for more information).
338  */
339  meminfo->bank[0].start = 0;
340  meminfo->bank[0].size = SZ_256M;
341  meminfo->bank[1].start = 0x20000000;
342  meminfo->bank[1].size = SZ_512M;
343  meminfo->bank[2].start = 0x80000000;
344  meminfo->bank[2].size = SZ_256M;
345  meminfo->nr_banks = 3;
346 #else
347  realview_fixup(tags, from, meminfo);
348 #endif
349 }
350 
351 static void realview_pbx_restart(char mode, const char *cmd)
352 {
353  void __iomem *reset_ctrl = __io_address(REALVIEW_SYS_RESETCTL);
354  void __iomem *lock_ctrl = __io_address(REALVIEW_SYS_LOCK);
355 
356  /*
357  * To reset, we hit the on-board reset register
358  * in the system FPGA
359  */
360  __raw_writel(REALVIEW_SYS_LOCK_VAL, lock_ctrl);
361  __raw_writel(0x00F0, reset_ctrl);
362  __raw_writel(0x00F4, reset_ctrl);
363  dsb();
364 }
365 
366 static void __init realview_pbx_init(void)
367 {
368  int i;
369 
370 #ifdef CONFIG_CACHE_L2X0
371  if (core_tile_pbxa9mp()) {
372  void __iomem *l2x0_base =
373  __io_address(REALVIEW_PBX_TILE_L220_BASE);
374 
375  /* set RAM latencies to 1 cycle for eASIC */
376  writel(0, l2x0_base + L2X0_TAG_LATENCY_CTRL);
377  writel(0, l2x0_base + L2X0_DATA_LATENCY_CTRL);
378 
379  /* 16KB way size, 8-way associativity, parity disabled
380  * Bits: .. 0 0 0 0 1 00 1 0 1 001 0 000 0 .... .... .... */
381  l2x0_init(l2x0_base, 0x02520000, 0xc0000fff);
382  platform_device_register(&pmu_device);
383  }
384 #endif
385 
386  realview_flash_register(realview_pbx_flash_resources,
387  ARRAY_SIZE(realview_pbx_flash_resources));
388  realview_eth_register(NULL, realview_pbx_smsc911x_resources);
389  platform_device_register(&realview_i2c_device);
390  platform_device_register(&realview_cf_device);
391  realview_usb_register(realview_pbx_isp1761_resources);
392 
393  for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
394  struct amba_device *d = amba_devs[i];
395  amba_device_register(d, &iomem_resource);
396  }
397 }
398 
399 MACHINE_START(REALVIEW_PBX, "ARM-RealView PBX")
400  /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
401  .atag_offset = 0x100,
402  .smp = smp_ops(realview_smp_ops),
403  .fixup = realview_pbx_fixup,
404  .map_io = realview_pbx_map_io,
405  .init_early = realview_init_early,
406  .init_irq = gic_init_irq,
407  .timer = &realview_pbx_timer,
408  .handle_irq = gic_handle_irq,
409  .init_machine = realview_pbx_init,
410 #ifdef CONFIG_ZONE_DMA
411  .dma_zone_size = SZ_256M,
412 #endif
413  .restart = realview_pbx_restart,
414 MACHINE_END
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